Abstract: A cooling device for battery cells assembled to form a module, having a base body and an insert which has receptacles for an end portion of the battery cells with recesses in the cell head. The insert together with the base body delimits a flow channel for a temperature control fluid A cooling device of this type permits operationally reliable accommodation of the battery cells with low manufacturing costs and high temperature control performance, without having to take manufacturing tolerances into account in advance. The receptacles form a fluid-tight membrane which encloses the end portion of the battery cells, which membrane is deformable for tolerance compensation of the individual battery cells and rests against the cell bottom when the flow channel is filled.

Abstract: The invention relates to a temperature-control device (1) for a battery system, at least comprising a cuboid-shaped hollow body (2) with at least one connection device (3) for supplying and at least one connection device (4) for discharging a separately temperature-controlled fluid, a plurality of regularly arranged and identically formed openings (7) extending from a first body surface (5) to a second body surface (6), wherein a cylindrical battery cell (8) is accommodated by each opening (7), so that a fluid-tight liquid space is formed, which is characterized in that the hollow body (2), excluding the cell head (11) and the cell bottom (12), extends over a height h of >20 to <100% of the total height H of the battery system.